package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * @author xmy
 * @version 1.0
 */
@Service
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private OrderDetailMapper orderDetailMpper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WebSocketServer webSocketServer;
    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submit(OrdersSubmitDTO ordersSubmitDTO) {

        //处理各种异常（地址簿为空，购物车数据为空）
        AddressBook addressBook=addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook==null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        //查询当前用户购物车数据
        Long userId= BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartLit=shoppingCartMapper.list(shoppingCart);
        if(shoppingCartLit==null||shoppingCartLit.size()==0){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //向订单表插入一条数据

        Orders orders=new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);
        orders.setAddress(addressBook.getProvinceName()+addressBook.getCityName()+addressBook.getDistrictName()+addressBook.getDetail());
        orderMapper.add(orders);

        //向订单明细表插入n条数据
        List<OrderDetail> orderDetails=new ArrayList<>();
        for(ShoppingCart cart:shoppingCartLit){
            OrderDetail  orderDetail=new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetails.add(orderDetail);
        }
        orderDetailMpper.insertBatch(orderDetails);

        //清空当前用户购物车数据

        shoppingCartMapper.deleteByUserId(userId);
        //返回数据
        OrderSubmitVO orderSubmitVO=OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();
        return orderSubmitVO;
    }
    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
        //通过websocket向客户端推送消息
        Map map=new HashMap();
        map.put("type",1);//1来单提醒2表示客户催单
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号:"+outTradeNo);
        String json= JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
    }

    /**
     * 客户催单
     * @param id
     */
    public void reminder(Long id) {
        //根据id查询订单
        Orders orders=orderMapper.getById(id);

        //校验订单是否存在
        if(orders==null){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Map map=new HashMap();
        map.put("type",2);//2标识客户催单
        map.put("orderId",id);
        map.put("content","订单号:"+ orders.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }

    /**
     * 查询订单详情
     * @param id
     * @return
     */
    public OrderVO queryOrderDetail(Long id) {
        Orders orders=orderMapper.getById(id);
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        List<OrderDetail> orderDetails=orderDetailMpper.getByOrderId(id);
        orderVO.setOrderDetailList(orderDetails);
        return orderVO;
    }

    /**
     * 取消订单
     * @param id
     */
    public void cancel(Long id) {
        Orders orders=orderMapper.getById(id);
        if(orders==null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        if(orders.getStatus()>2){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        // 订单处于待接单状态下取消，需要进行退款
        if (orders.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.cancel(orders);
    }

    /**
     * 订单分页查询
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult list(OrdersPageQueryDTO ordersPageQueryDTO) {

        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());//动态拼接sql，（limited 0，10）
        Page<Orders> page=orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> list = new ArrayList();

        // 查询出订单明细，并封装入OrderVO进行响应
        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {
                Long orderId = orders.getId();// 订单id

                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailMpper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);
                String orderDishs=getOrderDishesStr(orders);
                orderVO.setOrderDishes(orderDishs);
                list.add(orderVO);
            }
        }
        PageResult pageResult=new PageResult(page.getTotal(),list);
        return pageResult;

    }

    /**
     * 再来一单
     * @param id
     */
    public void repetition(Long id) {
        Long userId=BaseContext.getCurrentId();
        List<OrderDetail> byOrderId = orderDetailMpper.getByOrderId(id);
        //将订单详情转换为购物出对象
        List<ShoppingCart> shoppingCartList=byOrderId.stream().map(x->{
            ShoppingCart shoppingCart=new ShoppingCart();
            BeanUtils.copyProperties(x,shoppingCart,"id");//排除了对id的复制
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;
        }).collect(Collectors.toList());
        for(ShoppingCart shoppingCart:shoppingCartList){
            shoppingCartMapper.insert(shoppingCart);
        }
    }

    @Override
    public OrderVO getById(Long id) {

        Orders orders=orderMapper.getById(id);

        OrderVO orderVO = new OrderVO();
        List<OrderDetail> orderDetails=orderDetailMpper.getByOrderId(id);
        orderVO.setOrderDetailList(orderDetails);
        BeanUtils.copyProperties(orders,orderVO);
        String orderDishs=getOrderDishesStr(orders);
        orderVO.setOrderDishes(orderDishs);
        return orderVO;
    }

    /**
     * 拒绝接单
     * @param ordersRejectionDTO
     */
    public void update(OrdersRejectionDTO ordersRejectionDTO) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders=new Orders();
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setId(ordersRejectionDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelTime(LocalDateTime.now());
       // orders.setCancelReason(ordersRejectionDTO.getRejectionReason());
        orderMapper.update(orders);
    }

    /**
     * 获取订单数
     * @return
     */
    public OrderStatisticsVO getData() {
        Long userId=BaseContext.getCurrentId();
        List<Orders> ordersList=orderMapper.getData();
        OrderStatisticsVO orderStatisticsVO=new OrderStatisticsVO();
        orderStatisticsVO.setConfirmed(0);
        orderStatisticsVO.setDeliveryInProgress(0);
        orderStatisticsVO.setToBeConfirmed(0);
        if(ordersList==null){
            return orderStatisticsVO;
        }
        for(Orders orders:ordersList){
            if(orders.getStatus()==3){
                orderStatisticsVO.setConfirmed(orderStatisticsVO.getConfirmed()+1);
            }else if(orders.getStatus()==4){
                orderStatisticsVO.setDeliveryInProgress(orderStatisticsVO.getDeliveryInProgress()+1);
            }else if(orders.getStatus()==2){
                orderStatisticsVO.setToBeConfirmed(orderStatisticsVO.getToBeConfirmed()+1);
            }
        }
        return orderStatisticsVO;

    }

    /**
     * 接单
     * @param ordersConfirmDTO
     */
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders=new Orders();
        BeanUtils.copyProperties(ordersConfirmDTO,orders);
        //System.out.println(orders);
        orders.setStatus(Orders.CONFIRMED);
        orderMapper.update(orders);
    }

    public void cancelAdmin(OrdersCancelDTO ordersCancelDTO) throws Exception {
//        // 根据id查询订单
//        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());
//
//        //支付状态
//        Integer payStatus = ordersDB.getPayStatus();
//        if (payStatus == 1) {
//            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
//        }

        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 派送订单
     * @param orders
     */
    public void delivery(Orders orders) {
      orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
      orders.setDeliveryTime(LocalDateTime.now());
      orderMapper.update(orders);
    }

    /**
     * 订单完成
     * @param orders
     */
    public void complete(Orders orders) {
        orders.setStatus(Orders.COMPLETED);
        orderMapper.update(orders);
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMpper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }

}
